diff --git a/extensions/av1/README.md b/extensions/av1/README.md
index 276daae4e2..54e27a3b87 100644
--- a/extensions/av1/README.md
+++ b/extensions/av1/README.md
@@ -96,6 +96,14 @@ a custom track selector the choice of `Renderer` is up to your implementation.
 You need to make sure you are passing a `Libgav1VideoRenderer` to the player and
 then you need to implement your own logic to use the renderer for a given track.
 
+## Using the extension in the demo application ##
+
+To try out playback using the extension in the [demo application][], see
+[enabling extension decoders][].
+
+[demo application]: https://exoplayer.dev/demo-application.html
+[enabling extension decoders]: https://exoplayer.dev/demo-application.html#enabling-extension-decoders
+
 ## Rendering options ##
 
 There are two possibilities for rendering the output `Libgav1VideoRenderer`
diff --git a/extensions/ffmpeg/README.md b/extensions/ffmpeg/README.md
index fe4aca772a..1b2db8f0f4 100644
--- a/extensions/ffmpeg/README.md
+++ b/extensions/ffmpeg/README.md
@@ -106,9 +106,19 @@ then implement your own logic to use the renderer for a given track.
 [#2781]: https://github.com/google/ExoPlayer/issues/2781
 [Supported formats]: https://exoplayer.dev/supported-formats.html#ffmpeg-extension
 
+## Using the extension in the demo application ##
+
+To try out playback using the extension in the [demo application][], see
+[enabling extension decoders][].
+
+[demo application]: https://exoplayer.dev/demo-application.html
+[enabling extension decoders]: https://exoplayer.dev/demo-application.html#enabling-extension-decoders
+
 ## Links ##
 
+* [Troubleshooting using extensions][]
 * [Javadoc][]: Classes matching `com.google.android.exoplayer2.ext.ffmpeg.*`
   belong to this module.
 
+[Troubleshooting using extensions]: https://exoplayer.dev/troubleshooting.html#how-can-i-get-a-decoding-extension-to-load-and-be-used-for-playback
 [Javadoc]: https://exoplayer.dev/doc/reference/index.html
diff --git a/extensions/flac/README.md b/extensions/flac/README.md
index 84a92f9586..a9d4c3094e 100644
--- a/extensions/flac/README.md
+++ b/extensions/flac/README.md
@@ -97,6 +97,14 @@ a custom track selector the choice of `Renderer` is up to your implementation,
 so you need to make sure you are passing an `LibflacAudioRenderer` to the
 player, then implement your own logic to use the renderer for a given track.
 
+## Using the extension in the demo application ##
+
+To try out playback using the extension in the [demo application][], see
+[enabling extension decoders][].
+
+[demo application]: https://exoplayer.dev/demo-application.html
+[enabling extension decoders]: https://exoplayer.dev/demo-application.html#enabling-extension-decoders
+
 ## Links ##
 
 * [Javadoc][]: Classes matching `com.google.android.exoplayer2.ext.flac.*`
diff --git a/extensions/opus/README.md b/extensions/opus/README.md
index 05448f2073..d3691b07bd 100644
--- a/extensions/opus/README.md
+++ b/extensions/opus/README.md
@@ -101,6 +101,14 @@ a custom track selector the choice of `Renderer` is up to your implementation,
 so you need to make sure you are passing an `LibopusAudioRenderer` to the
 player, then implement your own logic to use the renderer for a given track.
 
+## Using the extension in the demo application ##
+
+To try out playback using the extension in the [demo application][], see
+[enabling extension decoders][].
+
+[demo application]: https://exoplayer.dev/demo-application.html
+[enabling extension decoders]: https://exoplayer.dev/demo-application.html#enabling-extension-decoders
+
 ## Links ##
 
 * [Javadoc][]: Classes matching `com.google.android.exoplayer2.ext.opus.*`
diff --git a/extensions/vp9/README.md b/extensions/vp9/README.md
index 71241d9a4f..fd0836648a 100644
--- a/extensions/vp9/README.md
+++ b/extensions/vp9/README.md
@@ -114,6 +114,14 @@ a custom track selector the choice of `Renderer` is up to your implementation,
 so you need to make sure you are passing an `LibvpxVideoRenderer` to the
 player, then implement your own logic to use the renderer for a given track.
 
+## Using the extension in the demo application ##
+
+To try out playback using the extension in the [demo application][], see
+[enabling extension decoders][].
+
+[demo application]: https://exoplayer.dev/demo-application.html
+[enabling extension decoders]: https://exoplayer.dev/demo-application.html#enabling-extension-decoders
+
 ## Rendering options ##
 
 There are two possibilities for rendering the output `LibvpxVideoRenderer`